Re: the " 'official' point of view" expressed by kernelnewbies.org regarding reiser4 inclusion

Edward Shishkin
2006-08-08T11:06:44Z

Matthias Andree wrote:
> [stripping Cc: list]
>
> On Thu, 03 Aug 2006, Edward Shishkin wrote:
>
>
>>>What kind of forward error correction would that be,
>>
>>Actually we use checksums, not ECC. If checksum is wrong, then run
>>fsck - it will remove the whole disk cluster, that represent 64K of
>>data.
>
>
> Well, that's quite a difference...
>
>
>>Checksum is checked before unsafe decompression (when trying to
>>decompress incorrect data can lead to fatal things).
>
>
> Is this sufficient? How about corruptions that lead to the same checksum
> and can then confuse the decompressor?

It is a multiplication of two unlikely events: fs corruption
and 32-hash collision. Paranoid people can assign zlib-based
transform plugin: afaik everything is safe there.

Is the decompressor safe in that
> it does not scribble over memory it has not allocated?
>

yes